Pump.



PATENTED NOV. 19, 1907.

No. 871,357. C.` L. NEWGOMB.

PUMP.

APPLICATION FILED JUNE 7 rivaleI .srarris rarnnr sferen.

CHARLESl NEWCOMB, Oli HOLYOKE, l\I^\SS.-\UHUSIS1TS. ASSGNOR TO INTERNATIONAL STEAM PUMP COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

PUMP.

vne. 871,357.

Specification of Letters ltatent.

Patented Nov. 19, 1907.

Appiano and nu, 7.1906. semi in. 320.518.

T o all wlw/m, it ymay concern:

Be it known .that-'l, (Timmins li, NEW

00MB, a citizen of the United States, residingl Q at Holyoke, county et Hampden, and State of lllassachusetts, have invon ted certain new and useful improvements .in linnps, lully described and represented in the followiniar specification and the accompanying drawings, forming a part of the same.

This invention relates to an improved valve chamber and valve scat construction,

which is adapted especially for use in paper stutl' pumps, but may be used also in other classes of pumps, the object of the invention being to provide an improved construction by which danger of clogging,r the pump shall be avoided, water tight joints of the valve seats be secured, andthe valve seats be properly held in place by devices permitting the convenient removal ol.E the` valve seats for repair and avoidingjleakage about the seat holding devices.'

In the accompanying drawings forming,r a part ol' this application, the invention shown as applied in its preferred form in connection with a well-known type ol pump.

This construction will now bc describedin detail, and the features forming the inven- -tion then particularly pointed out in the claimsY In the drawingseFigure l is a vertical central section of the suction and force 'alvo chambers oi the pump and the pulsation chamber between them.. Fig. 2 is a cross section of the same on the line 2 of Fig. 1. Fis. 3 is a detail side elevation of the suction valve Ichamber. Fig. 4 is a detail section on 'the line 4 of Fig. 1.

Referring to said drawings, A is the upper end of the pump cylinder, B. the pulsation chamber, C the suction valve chamber' and l) the force valve chamber, ai, b the suction valve and valve seat and c, d the force valve andvalve seat. The valves o, c are shown as the usual ball valves coasting with the sharp edges l ot' the valve seats b, d to make tight joints, and the valves a, c are guided in their opening' and closing movements by the valve guides e, one of the valve guides being preferably formed on the hand hole plate f so aste be withdrawn with the .lat ter leaving the valve and valve seat free for removal.

The valve chambers (l, D are preferably circular as shown, this form securing an nn ortant result in stutl' and similar pumps as t ere i i l l l l i l edge.

are no corners to catch the Stull and clog the pump. l

lt is important that the edges of the valvr` seats I), ifo-acting,r with the ball valves a., c shall he kept sharp, and these edges l are 6o worn b v the action ol the ball, so that it is necessary at times to remove the valve seat and square oil the iace to restore the sharp For this purpose it is important that the valve scat shall readily he removed and replaced and he ol such form and so held as to secure tight joints between it and the valve. chamber. ln my improved construction, the valve seats are circular and lit into plain bored-holes in the valve chamber, ,so that it is easy to make a perfect joint, and the valve seats are provided with the bevj veled surfaces 2 at the top which are engaged at opposite sides ol the valve scat by the holding studs 3 by which the valve seats are 75 held in place. The pressure of' the studs 3, therefore, presses the valve seats down. and side/wise so as to lock the valve seats in place and assure tight joints between the valve seats and thc walls of the valve chambers. The holding studs 3 are bolts passing throuffh the chamber walls, so as to bc accessible outside the chambers for releasing and securing the valve seats. These stud bolts 3 are preferably made of non-corrosive ma- 85 torial such as Tobin bronze and work through nuts 4 set into )ocltets in the chamber cast ing, the nuts 4 being threaded to receive the. threaded part of the stud bolts 3 and preferably being,l of non-corrosive material. 90 Outside the nuts 4f thc stud bolts 3 pass through a hole in the chamber casting and are threaded at their outer ends to receive cap nuts 5 which act as check nuts and protectlthe ends of the stud bolts from injury. Between the ca) nuts 5 and the chamber castings arc washers 6, preferably of copper, which act as aching; and, when the nuts 5 are screwed r own tight, prevent any leak i from the valve chamber )ast the Stud bolts'. 100

The washers 6 are pre erably star-shaped with some of the points 7 turned down over squared portions of the boss on the cylinder casting and other points turned up. against the squared parts of the can nut, thus pre; venting the nuts 5 from haclliing oil and the stud bolts 3 from hacking out, and avoiding all danger of the valve seat holdhngr devices working loose, 'while the cap nuts 5 may readily be removed and the stud bolts 3 110 f and that the form and arrangement of the parts illustrated may be varie While retain- 1n y the invention defined by the claims.

tlllhat .I olaim is :-l

1. n a pump, the combination' with a removable valve seat, of holding studs passing through the valve chamber wall, nuts held stationary in the inner chamber Wall and threaded to receive the studs, and check nuts on the studs outside the chamber.

2. In apump, the combination with a re-r movable valve seat7 of holding studs passin through the valve chamber Wall, nuts hel stationary in the inner chamber 'Wall and threaded to receive the studs, check nuts on the studs outside the chamber, and star Washers between the cheek nuts and chamber wall for packing and locking the studs.

3. The combination with the circular valve chamber C, of the valve wand valve seat b, hand hole plate f carrying valve guide v e, and valve seat holding stu s extending through the chamber wall and adjustable for holdin and releasing the valve seat.

4. T e combination with a removable valve seat, of stud bolts 3, nuts 4 held in pockets in the chamber Wall, cap nuts 5 outside the chamber Wall, and star Washers V'- for'packing the stud bolts and lockingthe bolts and cap nuts.

In testimony whereof, I have hereunto set my hand, in the presence of two subscribing Witnesses.

CHARLES L. NEWeouB. lll/witnesses:

W. M. RAYNoLDs,

JAMES P. TAYLoR,Jr. 

